Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-985 1 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-03-26   
312-985 2 Chicago Zone 01-Calumet IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358   2000-07-07   
312-985 3 Chicago Zone 01-Calumet IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358   2000-07-07   
312-985 4 Chicago Zone 01-Calumet IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358   2000-07-07   
312-985 5 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358      
312-985 6 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-985 7 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-11-08   
312-985 8 Chicago Zone 01-Calumet IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358   2000-05-05   
312-985 9 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-03-26   
312-986 A Chicago Zone 01-Wabash IL CHCGILWBDS3  9329 ILLINOIS BELL TEL CO 358      
312-987 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 0 Chicago Zone 01-Superior IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2012-12-31   
312-988 1 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 2 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 3 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 4 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 5 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 6 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 7 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 8 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 9 Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-989 A Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-989 0 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2016-04-13   
312-989 1 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2016-04-06   
312-989 2 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2016-05-09   
312-989 3 Chicago Zone 01-Calumet IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2015-07-30   
312-989 4 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 5 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 6 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 7 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 8 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 9 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-990 A Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-991 A Wheeling IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-992 A Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-993 A Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 0 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 1 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 2 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 3 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 4 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 5 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 6 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 7 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 8 Chicago Zone 01-Canal IL CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 9 Chicago Zone 01-Canal IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-01-07   
312-994 A Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
312-994 0 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358      
312-994 1 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-08-25   
312-994 2 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2002-09-16   
312-994 3 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2010-04-22   
312-994 4 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-08-28   
312-994 5 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358      
312-994 6 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2001-06-15   
312-994 7 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2000-08-04   
312-994 8 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2007-05-18   
312-994 9 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2000-06-29   
312-995 A Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-995 0 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-10-14   
312-995 1 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2014-10-14   
312-995 2 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-10-14   
312-995 3 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-10-14   
312-995 4 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-10-14   
312-995 5 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-13   
312-995 6 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-13   
312-995 7 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-13   
312-995 8 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-13   
312-995 9 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-10-14   
312-996 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 0 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 1 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 2 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 3 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 4 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 5 Chicago Zone 01-Monroe IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2014-05-03   
312-997 6 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 7 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 8 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-997 9 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-998 A Chicago Zone 01-Calumet IL CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358      
312-998 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 4 Chicago Zone 01-Calumet IL CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-10-03   
312-998 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-998 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-999 A Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-999 0 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-08-14   
312-999 1 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-12-02   
312-999 2 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-12-02   
312-999 3 Chicago Zone 01-Calumet IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-10-14   
312-999 4 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-12-02   
312-999 5 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-12-02   
312-999 6 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-12-02   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.